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Патент USA US3045355

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July 24, 1962
R. J. BERMINGHAM
3,045,345
ELECTRICAL CHARGE GENERATING AND RETAINING ELECTRIC SHAVER HEAD
Filed Feb. 12, 1959
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United States atet
Egg
3,645,345
Patented July 24, 1962
2
1
shear plate 14 and cutter ‘20 upon relative movement
'therebetween. As best seen in FIGURE 1, a pair of
bores 24 and 26 may be provided in base 12 with a ball
3,045,345
ELECTRICAL CHARGE GENERATING AND
RETAINING ELECTRIC SHAVER HEAD
Raymond J. Bermingham, Denver, Colo.
bearing and the like 28 and 30 positioned within each
bore and biased against cutter member 20 ‘by means of
(832 Wellington Blvd, Columbus 19, Ohio)
springs 32 and 34. The bores 24 and 26 may be plugged
Filed Feb. 12, 1959, Ser. No. 792,851
at one end by means of plugs 36 and 38.
1 Claim. (CI. 30-43)
Base 12 is provided with a central opening 40 and cutter
This invention relates to an improvement in electric
member is provided with a central opening 42 in align
shaver heads and more particularly to shaver heads as 10 ment with opening 40 in base 12 of somewhat smaller
used in the dry ‘shaver type of razor having a motor
diameter. The driving mechanism, except for the re
operated cutter member reciprocatingly or otherwise
ciprocaitng actuator 44 is omitted since such mechanism
movable relative to a stationary shear plate.
is well-known to those skilled in the art and need not be
It is a primary object of the invention to provide an
described in "detail for the purposes of this application.
improved shaver head for a razor of the above category 15 Actuator 44 is seen to pass through opening 40 of base 12
which, when moved in contact with the user’s skin, is
which is of a diameter su?‘icient to permit the necessary
adapted to generate/and retain a static electrical charge
movement thereof.
to provide a hair-lifting effect whereby individual hairs
to be positioned within opening 42 of cutter 20. As the
actuator 44 is reciprocated from side to side, FIGURE 1,
this motion is imparted to cutter 20 which moves relative
will ‘be set into optimum cutting position in the path of the
shaver head during its operative movement.
‘
It is a further important object to provide an improved
shaver head which may be used in existing razors and
one which is both pleasing to the eye and simple of con~
struction and manufacture.
It is another object of the invention to provide an im
proved shaver head which obviates the discomfort many
people who suffer from allergies experience when a metal
lic object comes into contact with the skin of the face.
It is another object of the invention to provide an im—.
proved shaver head which is adapted to be employed
either with single or multiple-head electric dry shavers.
For a better understanding of the present invention
together with other and further objects thereof, reference
is bad to the following description taken in connection
with the accompanying drawing and its scope will be
pointed out in the appended claim.
\
In accordance with the invention, the improved shaver
to shear plate 14.
The upper end of actuator is seen
>
As shown in FIGURES 1 and 2, base 12 and shear
plate 14 are constructed of a dielectric material and cutter
2% is constructed of a conductor. Actuator 44 is pro
~ vided with an annular ring 46 of insulating material and
‘positioned in contact with cutter 24}. ‘It has been found
that where shear plate 14 is constructed of a dielectric
material adapted to develop a static electrical charge,
a charge is developed and retained therein on being
brought into rubbing contact wth the skin. The purpose
of insulator ring 46'is to prevent the accumulated charge
from leaking off to‘ the actuating mechanism and being
dissipated. Alternately, a collar of insulation material
(not shown) may be inserted in opening 42 of a size
sufficient to receive actuator and be a part of ‘cutter 20.
The static charge built up in the head 10 is found to
provide an attracting force for the hairs to be cut and
head comprises a cutter member in combination with a
tends to set ‘them into optimum cutting position in the .
shear plate wherein at least the shear plate is made of a
path of the shearer head during its operative movement.
40
dielectric material.
While many dielectric materials are suitable for the
Referring to the drawings:
purpose of developing a static electrical charge, it is
FIGURE 1 is an elevation, partly in section, of one
further required that the dielectric material have a surface
embodiment ofv the improved shaver head of the present
invention;
_
-
hardness comparable with steel, in order to maintain a
sharp edge over an exended period of use. Several such
FIGURE 2 is a view along line 2—2 of FIGURE 1;
dielectric materials are now available, such as “Pyro
FIGURE 3 is an elevation, partly in section, of an 45 ceram,” a trade name for a heat treated glass ceramic
other embodiment of the improved shaver head of the
developed by the Corning Glass Works of Coming, New
York. Using the Vicker’s Diamond Pyramid test at 500
present invention; and
FIGURE ‘4 is a view along line 4—4 of FIGURE 3.
grams, load,‘ the hardness of “Pyroceram” is 618 or ap
Referring to FIGURES ‘1 and 2, a shaving head 10 is
proximately equal to Rockwell C54. This material in
’ comprised of a base 12 having a shear plate 14.
Shear 50 ,7 addition to providing the requisite mechanical character
plate 14 is a relatively thin member of U-shaped cross
istics generates and retains static electricity generated by
section with the legs of the U attached to base 12.‘ It
friction. Other dielectric materials having similar physi
will be understood that plate 14 may be formed integral
cal and electrical properties as “Pyroceram” are con~
with base 12. Plate 14 is provided with a plurality of
templated to be used in carrying out the teachings of the
hair receiving openings 16 communicating the outer sur 55 instant invention.
'
face of plate 14 with the interior space 18 formed by the
Referring to FIGURES 3 and 4, the same parts are
shear plate 14 and base 12. The inner surface of shear
identi?ed by the same numbers as in FIGURES l and 2,
plate 14 remote of base 12 is arcuate and concentric with
but followed by a su?ix a. For example, the base is
the outer semi-cylindrical surface of plate 14. A'cutter
identi?ed by the reference numeral 12a. The shaver
60
member 20 is positioned within space 18 in movable rela
head 10a of FIGURES 3 and 4 is provided with a cutter
tion to base 12 and plate 14. Cutter member 20‘ may
43 of a dielectric ‘material having similar electrical and
conveniently be tubular in shape and of a size su?icient .
physical properties as the dielectric material used in shear
to provide mating slidable contact with the arcuate in
plate 14a. In this instance, the insulator ring 46, FIG
terior surface of plate 14. The'surface of cutter member
URE l, is not required. The construction of head 10a
20 mating with plate 14 is provided with a plurality of 65 provides an increase in generation and retention of the
openings 22 of similar size and shape as openings 16 in
static charge but is somewhat more expensive to manu
plate 14. Part of the openings 22 may be off-set from
facture than head 10.
at least part of the openings 16 axially along the tube
Following the teaching of the present invention, there is
comprising cutter 20. The openings 22 communicate the
provided an improved shaver head which has all the self
central opening of tubular cutter 20 into which the cut 70 sharpening features and durability of prior art shaver
heads and in addition provides means of developing a
hairs fall as they are cut by the shearing acting between
3,045,345
3
4
static charge to attract the hairs to be cut. The attraction
of this charge provides a cleaner shave and for those
individuals whose skin is subject to irritation by the con
tact of a metal shear plate, this irritation is obviated.
which when in frictional contact with human epidermis
generates and retains ‘a static electrical charge thereon,
Although the above described embodiments disclose
the invention as applied to single head shavers, it is to be
understood that the invention may be applied with equal
success to multi-head shavers. Further, the invention
may be applied to heads of shapes other than that shown
further including electrical insulating means, positioned
and arranged to insulate the generating member from the
and to other designs. For example, the shear plate may
References Cited in the ?le of this patent
said generating member being electrical conducting, hav
ing a hard and wear resistant surface, the combination
driving mechanism of an electric shaver to which it is
attached to prevent the generated charge from leaking off.
be provided with a plurality of minute holes and a cutter
bar be reciprocated across the holes in a sweeping action
and the like.
_
While there have been described what at present are
considered to be the preferred embodiments of this in 15
vention, it will be obvious to those skilled in the art that
various changes and modi?cations may be made therein
without departing from the invention. It is aimed there
fore, in the appended claim, to cover all such changes and
modi?cations which fall within the true spirit and scope
of the invention.
What is claimed is:
An electric shaver head comprising in combination, a
cutter member adapted to be driven and a shear member,
at least one of which being of a heat treated glass ceramic 25
UNITED STATES PATENTS
1,291,318
White _______________ __ Jan. 14, 1919
1,864,995
Frost _______________ __ June 28, 1932
2,040,345
Taylor ______________ __ May 12, 1936
2,063,808
Henderson et al. _______ __ Dec. 8, 1936
2,088,934
2,242,405
Van Den Berghen ______ __ Aug. 3, 1937
Sussman ____________ __ May 20, 1941
2,285,015
Cam?eld _____________ __ June 2, 1942
2,789,346
2,920,971
Algier et al ___________ __ Apr. 23, 1957
Stookey _____________ __ Jan. 12, 1960
252,844
889,618
Switzerland __________ __ Jan. 31, 1948
France ______________ __ Oct. 11, 1943
FOREIGN PATENTS
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